P1048 2017 GMC Sierra Code - Reductant Injector High Control Circuit Low Voltage
Quick Answer
The P1048 diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates a problem with the reductant injector high control circuit having low voltage. Common causes include Faulty reductant injector, Wiring or connector issues in the high control circuit, Corrosion or damage to the reductant injector system components. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1048 2017 GMC Sierra indicates Reductant Injector High Control Circuit Low Voltage.
- Common causes
- Common causes include Faulty reductant injector, Wiring or connector issues in the high control circuit, Corrosion or damage to the reductant injector system components.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P1048 2017 GMC Sierra Description
The P1048 diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates a problem with the reductant injector high control circuit having low voltage. In modern diesel vehicles, reductant injectors are crucial components of the selective catalytic reduction (SCR) system, which helps reduce harmful emissions by injecting a urea-based solution (DEF) into the exhaust stream. The reductant injector high control circuit is responsible for regulating the voltage supplied to the reductant injector, ensuring proper operation and emission control.
Common Causes of P1048 2017 GMC Sierra
- Faulty reductant injector
- Wiring or connector issues in the high control circuit
- Corrosion or damage to the reductant injector system components
- Issues with the powertrain control module (PCM)
- Electrical system malfunctions
Symptoms of P1048 2017 GMC Sierra
- Check engine light illuminated
- Reduced fuel efficiency
- Engine misfires or hesitation
- Increased emissions
- Difficulty starting the vehicle
How to Fix P1048 2017 GMC Sierra
- Diagnose the specific cause of the low voltage in the reductant injector high control circuit using a diagnostic scanner and multimeter.
- Inspect the wiring harness, connectors, and components related to the reductant injector system for any damage or corrosion.
- Test the reductant injector itself to determine if it is functioning properly or needs replacement.
- Repair or replace any faulty wiring, connectors, or components in the high control circuit.
- Clear the DTC and reset the system to ensure proper operation.
Cost to Fix P1048 2017 GMC Sierra
The cost of repairing a P1048 code on a 2017 GMC Sierra can vary depending on the specific cause of the issue. In general, replacement of a reductant injector can range from $200 to $600, while addressing wiring or connector problems may cost between $100 and $300. Labor costs can add an additional $80 to $150 per hour, with the total repair bill potentially ranging from $300 to $1000 or more. It's recommended to consult with a qualified mechanic or dealership for an accurate estimate based on your vehicle's unique circumstances. Labor rates and parts prices can vary significantly based on location and other factors.
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